1988 F-150 4×4 5.0 with a 5speed

So I just replaced the clutch slave cylinder and put tranny back on truck started up clutch is fix and then went to take for a test drive and 1st and 2nd got up to 4 5 rpm then when switching into 3rd from high rpms it went down to 1500 rpms and didnt move from there then switch into 4th it slowly started going up in rpms...wtf is going on please need advice (;

Nope i thought maby it was going into 5th too untill it
started working all of a sudden one time but only one
time didnt know if there was a sensor or somthing that
could gone out or somthing ima try n get a code reader
on there tomorrow using the old paper clip trick to count
the check engine light flashs n look up code i guess idk
what it could be ran perfect before clutch slave went out
n i had to drop tranny and it wasnt me putting it on wrong
not my first rodeo lol

I have a ford f150 pick up truck 5.0. The other day my tire blow out and caused the fuel pump safety switch to kick off and I push it back on. Now when I start it up it will run but I go give it gas a...

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